Size US7=UK6=EUR40=CM25. US7.5=UK6.5=EUR40.5=CM25.5. US8=UK7=EUR41=CM26. US8.5=UK7.5=EUR42=CM26.5. US9=UK8=EUR42.5=CM27. US9.5=UK8.5=EUR43=CM27.5. US10=UK9=EUR44=CM28. US10.5=UK9.5=EUR44.5=CM28.5. US11=UK10=EUR45=CM29. US12=UK11=EUR46=CM30. US13=UK12=EUR47.5=CM31